QUOTE (Colombo @ 22 Feb 2009, 17:47)
<{POST_SNAPBACK}>With regard to position light ground signals, there is a subtle difference between the older ones as depicted by the Eckon ES24 and more recent practise.
Originally stop was indicated by a red and a white light arranged horizontally and proceed at caution to the next stop signal was indicated by two white lights displayed at 45 degrees.
Nowadays the signal to stop is often given by two horizontal red lights, this being achieved by the light in the corner changing colour from white to red.......
As far as I am aware, the Eckon ES24 can show the more recent style by fixing red and white LEDs to the 'light pipe' going to the common 'lens'.
QUOTE ......The 3mm red/white LED can be obtained from a limited number of suppliers.....
So with the LED under the baseboard it does not necessarily have to be a 3mm one; this may give a wider range of choice.
The only GPLs and Anciliary lights I've seen modelled with LEDs actually in the head used surface-mounting (SMT)chips fixed in home-made Plasticard heads. These are described in "Model Railway Journal" No.171 published by Wild Swan Publications in 2006, on pages 311-317 in an article 'Scratchbuilding a modern bracket signal'. The signals described are used on the 'Widnes Vine Yard' layout of the Wirral Finescale Modellers, and are remarkable for their accuracy to the prototype.
And there is a full description of making multiple 'feathers' as well, also using SMT LEDs.
Regards,
John Webb